6.0L Power Stroke Engine and DrivetrainDiscussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

Mine was doing this as well and it would do it when I throttled off from highway speeds more so when at high operating temp, no quite as much when in town and putting around. It turned out to be the EGR cooler. Is he losing coolant? Is the EGR valve wet or the coking looks gooey? Took me 8 hours work and 300$ to fix it myself with hand tools in the driveway,or if your flush 2000k at a mechanic.
It could also be head gaskets, ficm, or injectors probably needs to be diagnosed and then choose your fix from there.

It's very likely a failed EGR cooler and that, without exception, failed because of a plugged oil cooler.

You've got a lot of research to do if you don't want to turn it over to a "pro" to diagnose it - even when I choose to use a pro I feel better about knowing the background information when I turn over the keys.

It's very likely a failed EGR cooler and that, "without exception", failed because of a plugged oil cooler.

You've got a lot of research to do if you don't want to turn it over to a "pro" to diagnose it - even when I choose to use a pro I feel better about knowing the background information when I turn over the keys.

Search on oil coolers for a lot of good information.

Really ? Without exception?? In every case? Yes it is good to check into it but without exception that's a hit of quite a few hundred dollars, are you sure in all cases I didn't do mine and it wasn't plugged did I make a mistake or save hundreds of dollars because mine was the exception?

When I fixed mine, after all the time is takes to get down that far, its not much more effort to replace the cooler and hpop screen. I'm also looking get a long life out of my truck, that also why, while being down that far did head gaskets and ARP studs. After my egr cooler went, there was really no good way of telling if the head gaskets were blown, so why not? I think the best approach on these trucks, and any vehicle for that matter is to be proactive. Fix it before it fails or do everything you can to prevent it.

Really ? Without exception?? In every case? Yes it is good to check into it but without exception that's a hit of quite a few hundred dollars, are you sure in all cases I didn't do mine and it wasn't plugged did I make a mistake or save hundreds of dollars because mine was the exception?

Ford, quite a while back now, updated their procedures to include the requirement that any time an EGR cooler is replaced that that the oil cooler must also be replaced/rebuilt.

Ford and others have traced the high failure rate of the EGR cooler to plugging of the oil cooler.

I would guess that Ford's decision was driven by not only the oil cooler issue but also the labor involved to pull the EGR cooler is not much more when including the oil cooler.

However, I wasn't including anyone who has a tuner or other mods that might also contribute to a failed EGR cooler.

Another really irritating thing is that, unless you have an 05 or newer model with the latest firmware, there's no way easy way to know if you're suffering from an oil cooler that is on it's way out. Long story short, if you don't have some way to monitor the EOT and ECT then you have no convenient way to know that you do or don't have an oil cooler problem.

All of the diesel fuel around us here is bio diesel and he adds the ford fuel addivtive to each tank but this is the first truck thats done this, he has a truck dealership and gets the same fuel and puts the same additive in every truck. He's worried about the 6.0

You can get a tester from napa to test the coolant to see if has carbon from the exhaust in it. most likely a EGR cooler or head gaskets. Ask him if the white smoke lingers in the air like smoke or dissipates like steam. Steam is the EGR cooler coolant around the degas bottle could be the head gaskets

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